Russell, A. (2006). Whitaker's World of Facts. Penguin books.
Lua i Stíl Chicago (17ú heag.)Russell, Ash. Whitaker's World of Facts. New Delhi: Penguin books, 2006.
Lua MLA (9ú heag.)Russell, Ash. Whitaker's World of Facts. Penguin books, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.